Blum, R.-P., Niehus, H., Hucho, C., Fortrie, R., Ganduglia-Pirovano, M. V., Sauer, J., et al. (2007). Surface metal-insulator transition on a vanadium pentoxide (001) single crystal. Physical Review Letters, 99(22): 226103. doi:10.1103/PhysRevLett.99.226103.